Journal
POLYMER
Volume 91, Issue -, Pages 33-40Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2016.03.044
Keywords
Water resistant microcapsule; Shell tightness; Self-healing anticorrosion coating
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Funding
- Ministry of Education of Singapore [RG15/13]
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Double-shelled microcapsules containing liquid 4,4'-bis-methylene cyclohexane diisocyanate ( HMDI) with outstanding water resistance are successfully synthesized via combination of interfacial and in-situ polymerization reactions in an oil-in-water emulsion. The diameter and shell thickness of microcapsules increased under lower agitation rate. The relative residue of core content of microcapsules remains more than 90% after 24 days in both ambient open air and water. Manually scratched polymer coatings with both fresh and conditioned microcapsules showed satisfactory anticorrosion performance in salt water via self-healing functionality. In addition, self-healing coatings with fresh microcapsules after immersion in ambient water for 30 days still possessed superior anticorrosion performance. (C) 2016 Elsevier Ltd. All rights reserved.
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